I have read that Bichons are amongst the worst dogs to housetrain. My eldest Bichon was 8 months before he was fully housetrained and then he started suffering from separation anxiety from around 12 months. I only had to leave him for 20 minutes and came back to wee and poo all over the kitchen even though he had been in the garden before I went out. It was hard work and very annoying but I just cleaned it up without saying anything to him. I finally got him out of this when I allowed him to stay in the living room instead of the kitchen with the baby gate shut but the door open. He doesn't like being left but he puts up with it now with no mess. We have two of them now. The youngest is housetrained now too I'm glad to say. It's just really a case of going out with them and giving loads of praise and maybe a little treat when they do it outside where you want them too and I'm sure it will click soon.
I think loneliness is playing a part in it too if she has always been used to having the other Bichon around too. Bichons seem to get attached to other Bichons. My sister had two bitches and they were more or less inseparable.
Have you any pictures cos I would love to see her.
